• Model NO.：Round Bar Scm440, SAE 4140, DIN 1.7225, 42CrMo4
• Heat Treatment：Annealed
• Length：3000-5800mm
• Non-Metallic Inclusiton：ASTM E45
• Grain Size：ASTM E112
• Process：Eaf+Lf+Vd+Forged+Heat Treatment(Optional)
• Technology：Hot Rolled, Forged, Cold Drawn
• Usage：Automotive, Aerospace, Power Generation, Oil & Gas
• Ex-Stock：Yes
• Service：24 Hours on Line
• Other Type：Engineering Steel, Cold Work Tool Steel
• Test：Ensile Strength, Yield Strength, Elongation,
• Other Type 1：Engineering Steel, Cold Work Tool Steel
• Other Type 2：Hot Work Tool Steel, Plastic Mold Steel
• Other Type 3：Spring Steel, High Speed Steel, Stainless Steel
• Other Type 4：Mold Steel, Free Cutting Steel, Cold Heading Steel
• Transport Package：Seaworthy Package
• Specification：DIA 60-600
• Trademark：zayi
• Origin：China
• HS Code：72284000
• Production Capacity：48000tons,Month

EN 10250Material No.DINASTM A29JIS G4105BS 970-3-1991BS 970-1955AS 1444AFNOR42CrMo41.722538HM4140SCM440708M40EN19A414042CD4 
3: D2 steel chemical composition42CrMo4/1.7225CMnSiPSCrMo0.38-0.450.60-0.900.40 max0.035 max0.035 max0.90-1.200.15-0.30 
4: D2 steel mechanical properties  Size Ø mmYield stress
Rp0.2,N/nn2, min.Ultimate tensile Stress,
Rm,N/nn2Elongation
A5,%, min.Hardness HBToughness
KV, Joule, min.<407501000-120011295-35535 at 20ºC40-95650900-110012265-32535 at 20ºC>95550800-950

5: D2 steel overviewsSizeRoundDia 10-200mmFlat bar/plateThickness:6mm-500mmWidth:20mm-1000mmHeat treatmentNormalized ; Annealed ; Quenched ; TemperedSurface conditionBlack; Peeled; Polished; Machined; Grinded; Turned; MilledDelivery conditionForged; Hot rolled; Cold drawnTestTensile strength, Yield strength, elongation, area of reduction, impact value, hardness, grain size, ultrasonic test, US inspection, magnetic particle testing, etc. Payment termsT/T;L/CTrade termsFOB; CIF; CFRDelivery time7-15 daysApplicationD2 used for Blanking Dies, Forming Dies, Coining Dies, Slitting Cutters, Heading Tools, Long Punches, Forming Rolls, Edging Rolls, Master Tools, Beading Rolls, Intricate Punches, Extrusion Dies, Drawing Dies, Lamination Dies, Thread Rolling Dies, Shear Blades, Burnishing Tools, Gauges, Knurls, Wear Parts. 
7:FAQ of 42CrMo4 Steel:

a.Quenched and Tempered (Q+T)

• Heat 42CrMo4 steel slowly to 880°C;
• Soak at this temperature then quench in oil;
• Temper as soon as 42CrMo4 steel reach room temperature (20°C);
• Heat uniformly to the suitable temperature of 560°C;
• Withdraw the 42CrMo4 material from the furnace and cool in the air.

b. Forging of 42CrMo4 Alloy Steel

• Preheat 42CrMo4 engineering steel uniformly and slowly;
• Increase the forging temperature up to 1150-1200°C.
• Always keep the forging temperature above at least 850°C

c.Weldability

Engineering steel 42CrMo4 has only limited weldability. Preheating to 200-300°C is strongly recommended; the upper limit should not be exceeded because of risk for deterioration of the chrome layer.

Alloy steel 42CrMo4 can be friction welded. However, precautions are necessary so as to limit the formation of undesirable microstructures in the welded zone.

d.Application of 42CrMo4 Alloy Steels

EN 42CrMo4 alloy steel is widely used for engineering steel purpose, such as: making various kinds of machinery, automobile, mining spare part, the gearwheel of the engine, the driving gear of supercharger, the connecting rob, the pinchock under the high pressure, parts for power train applications, cold formed fastener components, shafts, gears, drill collars for the oil exploration, etc.

FAQ:

Q: Where is your company ?
A: Our company located in liaocheng , shandong provice of China.

Q: Are you trading company or manufacturer?
A: we are manufacturer.

Q: How long is your delivery time?
A: Generally is 7-10 working days of goods in stock, or 20-30 days if goods are not in stock, it is according to quantitiy.

Q: Do you provide samples? is it free or extra?
A: Yes, we could offer the sample for free charge.but the customers have to pay the sample courier cost.

Q:. What kind of terms of payment?
A: T/T, L/C,Western Union Alipay,Cash are available.

Q: What is your terms of payment?
A: T/T 30% as deposit, and 70% before delivery. We'll show you the photos of the products and packages before you pay the balance.

Q. What is your terms of delivery?
A: EXW, FOB, CFR, CIF.

Q. Do you test all your goods before delivery?
A: Yes, we have 100% test before delivery

Q: How do you make our business long-term and good relationship?
A:1. We keep good quality and competitive price to ensure our customers benefit ;
2. We respect every customer as our friend and we sincerely do business and make friends with them, no matter where they come from.